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• The groundwater samples collected from all three monitoring wells contained detectable <br /> concentrations of petroleum hydrocarbons The highest concentrations were detected at MW-1 <br /> This sample contained 840 micrograms per liter (µg11) of TPH-as-het fuel, 7,700 µg/l of TPH-as- <br />' gasoline, 1,300 µg/l of benzene, 460 µg11 of toluene, 490 µg/I of ethylbenzene, and 670 µg/l of <br /> xylenes MTBE was not detected in any of the groundwater samples The groundwater sample <br /> analytical results are summarized in Table 4, the concentrations of petroleum hydrocarbons in <br /> groundwater are posted on Figure 6, and the laboratory reports are included in Appendix D <br /> 1� <br /> 1 <br /> 1 <br /> 11 <br /> 1 <br />